CVE-2022-49305
"RTL8192u Linux Kernel Deadlock Vulnerability"
Description
In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop() There is a deadlock in ieee80211_beacons_stop(), which is shown below: (Thread 1) | (Thread 2) | ieee80211_send_beacon() ieee80211_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | ieee80211_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ... We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.
INFO
Published Date :
Feb. 26, 2025, 7:01 a.m.
Last Modified :
April 14, 2025, 8:06 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-49305.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2022-49305 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49305 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Apr. 14, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-667 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.198 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.18 up to (excluding) 5.18.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.17.15 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.47 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.122 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.19.247 Added Reference Type kernel.org: https://git.kernel.org/stable/c/042915c1bfedd684c1d98a841794ee203200571a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1fbe033c52480f7954c057510040fa6286c4ea25 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/66f769762f65d957f688f3258755c6ec410bf710 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/806c7b53414934ba2a39449b31fd1a038e500273 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b34cb54923a6e5ddefbaf358c85c922c6ab456e2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b465bb2ebf666116c1ac745cb80c65154dc0d27e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ffc9cab7243f8151be37966301307bfd3cda2db3 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 26, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop() There is a deadlock in ieee80211_beacons_stop(), which is shown below: (Thread 1) | (Thread 2) | ieee80211_send_beacon() ieee80211_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | ieee80211_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ... We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock. Added Reference https://git.kernel.org/stable/c/042915c1bfedd684c1d98a841794ee203200571a Added Reference https://git.kernel.org/stable/c/1fbe033c52480f7954c057510040fa6286c4ea25 Added Reference https://git.kernel.org/stable/c/66f769762f65d957f688f3258755c6ec410bf710 Added Reference https://git.kernel.org/stable/c/806c7b53414934ba2a39449b31fd1a038e500273 Added Reference https://git.kernel.org/stable/c/b34cb54923a6e5ddefbaf358c85c922c6ab456e2 Added Reference https://git.kernel.org/stable/c/b465bb2ebf666116c1ac745cb80c65154dc0d27e Added Reference https://git.kernel.org/stable/c/ffc9cab7243f8151be37966301307bfd3cda2db3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49305 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-49305
weaknesses.